when updating from the currently stable 2.6.x series, please bear in mind that your edits will be preserved during this process, but it will not be possible to downgrade from 2.6 to 2.4.x any more.

Important note: to make sure that darktable can keep on supporting the raw file format for your camera, please read this post on how/what raw samples you can contribute to ensure that we have the full raw sample set for your camera under CC0 license!